Device for sewing machines



, Dec 27, 1938. J. P. WEIS DEVICE FOR SEWING MACHINES Filed y 1934 2Sheets-Sheet 1 I N V EN TOR. fa/121 p Wm, BY ATTORN Dec 27, 1938. J was2,142,079

DEVICE FOR SEWING MACHINES Filed May 15, 1954 2 Sheets-Sheet 2 IN VENTOR.

Joivn]? Week,

A TTOR Patented Dec. 27, 1938 UNITED STATES PATENT OFFICE DEVICE FORSEWING MACHINES Application May 15, 1934, Serial No. 725,689

29 Claims.

This invention relates to sewing machines and particularly tocombination trimming and feeding devices therefor, preferably in theform of an attachment, adapted to feed and simultaneously trim ordesign-cut the edge beyond the seam as the stitching proceeds. Machineshave previously been developed to simultaneously trim and sew a seam(for example those disclosed in my United States Patl0 ent Nos.1,946,514; 1,946,556; and 1,946,557) but most of these developments werelarge and costly structures since they were intended primarily forheavy-duty commercial use. Further, most of these previous developmentsdid not lend themselves readily for use with home or family sewingmachines, and especially to those machines already in use in the field.

Prior to this invention it was common practice in home or family sewingto design-cut edges 90 adiacent seams with a separate machine,subsequent to the seam forming, usually on a handcrank actuated machine.The use of this machine and method, and other equivalent ones in generaluse caused a considerable loss of time and caused an uneven orout-of-llne margin between the seam and the design-cut edge.

It is an object of the present invention to provide a trimming devicethat'may be applied to any sewing machine, especially machines used inhomes, so that a pinked or design-cut edge may be formed simultaneouslywith the ordinary stitching operations and in addition to thoseoperations performed by folding and other wellknown attachments thataccompany such machines. In this objective it is contemplated to havethe trimming device arranged to be attached and detached and operated inas simple a manner as the other attachments regularly furnished.

Another object is to provide an efllcient, inexpensive pinkingattachment that can be quickly attached or detached to any of the sewingmachines without change in construction or adjustment.

.located on a line with the needle to the right thereof, enabling it tostitch around curves, angles or corners so that the pinked trimmed edgewill always be at a uniform distance from the line of stitches.

A still further object of the present invention is to provide a simplepinking attachment with means for guiding the untrimmed edge of the workprior to the trimming, so arranged as to permit the surplus or irregularportions of the A further object is to have the attachment" seams to becut away from the garment so that all' seams, stitched and pinked, willpresent a uniform, sightly appearance and improve the product made onthe machine.

Another object is to provide means whereby 6 the speed at which thepinking cutter operates may be varied so that its cutting action andextent of movement will synchronize with the regular feed acting uponand feeding the work, and so that a differential effect may be obtained.

Yet another'object is to provide a trimming device for home machinesadapted to design-cut an edge with variable marginal spacing between theline of stitching and cut edge.

Further, home sewing machines are designed primarily to feed thin plainfabrics and difficulty is often experienced in feeding rough, thick ormulti-ply fabrics.

It is an object of the present invention to provide an auxiliary feed tomove the work either 20 during and with the trimming operation orwithout trimming according to requirements.

Features of the present invention include a novel mechanism for movingthe cutter transversely relative to the line of stitching in order 26 toobtain various size margins; a simple guide for accurately directing thework to the trim ming cutter; guards to protect the operators fingersfrom the needle and the trimming cutter while directing materialsthereto; a novel strip- 30 per for clearing trimmed materials from thecutter; a simple positive drive for the cutter; a novel mechanism forcontrolling and for varying the peripheral feed of the circular cutterrelative to regular feed; a trimmer operable coordinately 35 with theregular feeding and stitching apparatus driven by the reciprocatingneedle bar; and a simple mechanism forming an auxiliary feed operable,with or without thetrimming operation.

Other features and advantages will appear 40 hereinafter.

In the drawings:

Figure 1 is a front view of a sewing machine for use in homes, with thepresent invention applied thereto (the conventional electric motor driveisnot shown).

-Fig. 2 is an end view of the sewing machine and of the apparatus of thepresent invention, viewed in the direction of the arrow A in Fig. 1.

Fig. '3 is a top view of the trimming and feed- 50 ing device of thepresent invention and includes a fragmentary sectional showing of thework table and stitching mechanism.

Fig. 4 is an illustration showing pieces of work stitched togetherhaving the pinked edge. 55

Fig. 5 is a sectional detail view of the trimming and feeding device,taken on line 5-5 in Fig. 3. Fig. 6 shows details of the operating leverand the needle bar for giving movement to same.

Fig. 7 is a sectional view of a modified form of combined trimming andfeeding wheel.

In the detailed description which follows, the present invention is forillustration shown applied to a conventional form of home sewingmachine, but it will be understood that it is capable of application toother home machines, to machines used by dressmakers, and to existing orstandard sewing machines in industrial establishments for trimming andfor auxiliary feeding in a nonheavy duty manner.

The sewing machine shown herein comprises a frame I0 with a work supportAbove the work support the frame is provided with an integral verticaltrunk I2 and overhanging arm l3 with a head M in which a needle bar l5,presser bar l6, thread take up l1 and related conventional operatingmechanism are contained. A needle I8 is carried by the needle bar and isheld in place by a needle clamp l9 and set screw 20. The presser baralso operating in the head in the usual way carries a presser foot 2|.

Below the work support the machine is provided with a loop-taker hook 22carrying the usual bobbin 23 and operable in the usual way with theneedle |8 to make a well-known twothread lock stitch, for example, seam24 on plies 25 and 25' of material. Also, the machine is provided with amain feed 26 including an operating mechanism 21 of usual four-motiontype and a feed dog 28 which operates through a throat plate 29, a partof the work support, and coacts with the presser foot 2| to feed thematerial.

Because stitching, pressing, and feeding mechanisms are well known andbecause the present invention is equally applicable with divers types ofsuch mechanisms, detailed description has been omitted for the purposeof simplicity.

The trimming and feeding device 30 of the present invention in itspresent preferred form, is in the form of an attachment comprising abase 3| secured to the work support H by a bolt 32 through a hole 33, orthrough similar holes 33, to align with pre-tapped holes in the worksupport of other standard sewing machines. A locating, leveling andpositioning screw 34 bights into the support H at 35 to securelyposition the device and when properly positioned, is securely locked inplace by a nut 36. This base 3| forms the main support for a rotatorytrimming cutter 31 with any desired design-cutting edge 38, andoperating mechanism 39 therefor. Preferably the holes 33 and 33' areelongated to allow a major shifting and adjustment of the completedevice relative to the needle and line of stitching.

Finer adjustment and support of the trimming cutter 31 transverselyrelative to the needle |8 and to the line of stitching 24 and verticallyrelative to the work support II and materials 25 operated upon, isaccomplished with a particularly novel mechanism provided by the presentinvention. In its present preferred form this mechanism comprises anovel eccentric bushing 40 having a rotatory and a sliding fit in anangularly disposed bore 4| of the base, which is held in adjustedposition therein as by a saw slot 42 and clamp screw 43.

The cutter 31 and an operating clutch 44 therefor, are held inassociation with the eccentric bushing 40 and thereby in the base 3| bya shaft 45 in an eccentric bore 46 by having a head 41 engaging theinner end of the bushing 40 and having at its other end a reducedthreaded portion 43 adapted to receive and lock thereon the cutter 31and cupped clutch member 49 when a nut 50 and washer 5| are tightened. Apin 52 between the cutter and cupped member prevents relative rotationbetween these parts.

The shaft 45 also supports a crank arm 53 and driver clutch member 54for rotation on a main shank 45. Thickness of the parts on the outer endof the shaft are proportioned to prevent endwise movement of the shaft45 and associated parts in the eccentric bushing 40 after the nut 50 istightened.

Adjustment of the trimming cutter 31 transversely relative to the lineof stitching, is accomplished by merely loosening the screw 43 so thatthe eccentric bushing 40 may be turned and moved endwise in the bore 4|.In order to have the cutter spaced close to the needle l8 and to theline of stitching 24, a thin wall 55 of the eccentric bushing 40 ismoved toward the bottom wall 56 of the bore 4| as shown in Fig. 5,where- 'upon the bushing and associated cutter 31 must be movedoutwardly relative to the bore 4| and base H to a position closelyadjacent the needle H3 in order to bring the cutter into proper pressureand operating relationship with the work support II and the materialsthereon. The term work support herein is intended to mean either thelarge bottom or cloth plate integral with the frame I0, throat plate 29,or any other plate on the main frame In or on the base 3| supporting thework and underlying the trimmer cutter 31. Similarly, by moving a thickwall 55' of the eccentric bushing 40 near the bottom wall 56 of thebore, the cutter is moved clear of the work support and consequently maybe moved deeper into the bore to move the cutter laterally away from theneedle and to increase the margin of pinking relative to the line ofstitching to any desired degree, whereupon the eccentric bushing isagain turned to bring the cutter into proper relation with the materialsand the work support; then the holding screw 43 is tightened.

Thus, it is possible to obtain any desired margin between the line ofstitching 24 and the trimmed edge 51 through a considerable range withthe present mechanism. Also, this same angular and eccentric arrangementprovided by the present invention makes it possible to easily andquickly change the spacing of the trimming cutter 31 above the worksupport H for various thicknesses and qualities of material withoutchanging the spacing relative to the needle l3. by merely grasping theflange 58 and rotating the eccentric bushing 40 in the bore 4| withoutmoving it angularly or axially therein.

By providing the flange 58 with holes to receive a rod, or providing itwith flats to receive a wrench, it is possible to turn the eccentricbushing 40 while it is snug in the bore 4|, and while the machine isoperating.

The cutting takes place at 53 (see Fig. 5) where the zig-zag cuttingsurface 38 of the cutter 31 acts with considerable pressure on thematerials carried by the work support With most materials a severanceoccurs even though the cutting edge is spaced slightly from the worksupport.

The driver clutch member 54 is provided with a plurality of flats 60,each adapted to support a. roller 6| backed by a spring in the usualmanner, and arranged, in the well known manner for clutches of thissort, to move the rollers ineffectively relative to the cupped member 43as the crank arm 53, through a pin 62, moves the driver member 54 in acounter-clockwise direction as viewed in Fig. 2, and cause the rollers8| to bight the cupped member 49 and movethe interconnected cutter 31 inthe direction of the arrow B when the crank arm 53 and associated drivenmember 54 are moved in a clockwise direction.

Feed of material relative to the trimming cutter 31 is accomplished bythe cutter itself and consequently it is desirable to have a positivefeed thereof in time and space relationship with the feed dog 28 andother operating parts of the machine. In order to facilitate assemblyand use of the present type device with home machines, the presentinvention provides a simple driving connection 39 associated with thereciprocatory needle bar l5 rather than with the less accessibleoperating parts below the work table. This arrangement also facilitatesthe finer final operating adjustments.

Rotation of the trimming cutter 31, in synchronism and desiredperipheral extent with the regular feed mechanism 26 and feed dog 28 isaccomplished through the provision of a lever 63 pivotally mounted on astud on the upper end of an arm extension 64 of the base and having anintegral short arm 65 near the back of the extension as viewed in Fig.2, which through a link 66 and through pivots 61 and 68 is connected tothe crank arm 53, and at the front thereof having an integral long arm69 with inclined edges 10 and 11 adapted to co-operate with the needlebar [5 preferably through a roller 12 supported on the needle clamp i9.The relationship of the lever 63 and needle bar i5 is best seen in Figs.2 and 6. A spring 13 supported by the extension 64 and at one endengaging a boss 64' on the extension, and at its other end engaging ayoke section 14 of the lever 63, normally tends to move the lever in aclockwise direction around a pivot 15 as viewed in Fig. 2, maintainingit in the raised position shown therein and shown in solid lines in Fig.6 and yieidingly permitting the lever to be moved into the dottedposition 69' shown in Fig. 6 as the roller 12 moves over the inclinededges 10 and 1|.

As the lever 63 is moved in a couhter-clockwise direction, from thesolid line to the dotted line position shown in Fig. 6, the short arm 65pulls the link 66 in a right-hand direction and moves the interconnectedcrank arm 53 and member 54 in a clockwise direction causing the enclosedrollers 6| to bight the cupped member 49 and thereby rotate theinterconnected trimming cutter 31 in the direction of the arrow B. Uponreturn of the needle bar l5 and roller 12 into the upper position again,the spring 13 moves the lever 63 in a clockwise direction again andthereby moves the interconnected crank arm 53 in a counterclockwisedirection whereupon the clutch rollers 6| move ineifectively relative tothe driven clutch member 49.

Adjustment of peripheral feed of the cutter 31 relative to feed of thedog 28 is accomplished through the provision of a plate 16 pivoted on astud 11 and clamped with a holding screw 18 passing through an elongatedslot 19. A maximum feed is obtained when the plate is in the lowposition shown in Fig. 2; however, when it is moved upwardly relative tothe arm 69 it changes the angle of the inclined edge 10 by forming anadjustable inclined edge 10 and moves the other inclined edge 1!forwardly or farther away from.

theneedle bar l5 so that the amount of pivotal movement of the lever bythe needle bar is reduced and a proportionate reduction of the amount ofcrank arm, clutch, and cutter movement is obtained.

' When it is desired to have the feed ineflective without disconnectingany of the main parts, it is merely necessary to move and lock the plate16 in the upper position with the screw 18, whereupon the edge 10' is ona plane with the edge 1| and no oscillation of the lever 63 occurs.

Convex and concave effects may also be accomplished on the materialsoperated upon through use of the device of the present invention byadjusting the peripheral speed of the trimming cutter 31 so that it isgreater or less respectively than the feed of the dog 28. Thesedesirable effects are made possible through the structure of the presentinvention including the trimming cutter 31 immediately adjacent theneedle I 8 transversely relative to the line of stitching; viz, theseeffects could not be accomplished satisfactorily if the drivingmechanism of the trimming cutter necessitated placing the trimmingcutter ahead of, or behind the needle relative to the line of stitching.

Operation of the device, as will be apparent from the foregoing,consists of simply feeding the materials, for example the plies 25 and25' of cloth to the main feeding mechanism 26 in proper relation to theneedle l8 and trimming cutter 31 whereupon the main feeding mechanismadvances the work relative to the needle in order to form the line ofstitching 24, and at the same time the needle bar in its reciprocationrotates the trimming cutter in proper or desired peripheral ratio withthe main feed mechanism in order to form the design-cut edge 51conforming with the particular shape of the cutting. edge 38 of thetrimming cutter and the toothlike design of the cutter teeth at the sametime serves to advance the materials at the line of pinking.

It is within the purview of this invention to adjust the trimming cutter31 vertically relative to the work support II in such manner that itwill merely press against and, as it rotates, pull the material throughthe machine without cutting it, thus forming a supplementary feedingdevice which is particularly advantageous when sewing extra thickmaterials in which the load is heavy on the main feeding mechanism 26 orwhere the materials are such that the feed dog teeth tend to catch andimpede regular feeding.

In order to safeguard the fingers of the operator from injury by thecutter, a guardis provided which may be an integral part of the base 3|or may be secured thereto. A downwardly extending finger 69' also formsa guard and is arranged to move forwardly of the machine to push anoperator's hand away from the needle It as the needle bar is moveddownwardly.

A suitable adjustable guide 8| including a. right angle plate 82, isattached to a front wall of the base by a screw 83 passing through anelongated slot 84. To prevent trimmed fabrics from following around thecutter 31, the present invention provides a stripper blade 85, of flatspring stock, held in place against the back-up running surface of thecutter 31, and on the base by the screw 43. This stripper also preventsthe -trim mings or threads from travelling around or winding upon thecutter.

In Fig. 7 there is shown a modified form of combination circular cutterand feeder 31 including a hub 88, outer member 38' and' resilientsupport 89. The resilient support allows the outer member to yield andride over seams to facilitate feeding and cutting. Lug and slotconnections 90 and 9! insure the clutch l4 rotating the shaft 45.

Although the present invention is shown as an attachment applied to aregular sewing machine, and one of the main advantages of the inventionis that it may be easily applied to standard sewing machines andmachines previously sold and used, it should be understood that it mayin its essential details be made integral with the sewing machine.

Also, the present invention may be used independently of a sewingmachine, or on the sewing machine independently of the stitching. In theformer connection the work support would preferably be made integralwith the base 3| and the crank arm 53 would be provided with a hand knobon the pivot 61, and in the. latter connection the needle i8 or thethread thereto, or the looper 22 and cooperating thread may be removed.Thus, the present invention may be used to design-cut one or more pliesof material previous to the stitching so that these design-cut materialsmay be in parallel marginally spaced relation to each other at the timeof stitching, and may be used to trim subsequently or previously to thetime of stitching in order to obtain narrow and wide spaced marginsrelative to the seam and other desirable effects.

From the foregoing, it will be understood that the present inventionprovides a very simple, inexpensive pinking attachment that may beapplied to many of the machines now in use, and that it will efllcientlycut or trim with a zig-zag or other form or pattern, all kinds offabrics, that pinking cutters of different designs may beinterchangeably used not only for pink-trimming the edges of the goods,but will also be useful in feeding the goods without trimming. It shouldalso be understood that feed wheels with roughened or smooth surfacescan be substituted for the cutter when it is desired to feed bindings,strips or cords, or any other materials, to the stitching mechanism.

Other variations and modifications may be made within the scope of thepresent invention and portions of the improvements may be used withoutothers.

I claim:

1. A trimming device, for sewing machines having a stitching mechanismincluding a needle bar, comprising a base with a bore; a work support; arotatable circular cutter; and an eccentric bushing turnable and endwisemovable in the bore, adapted to locate and support the circular cutterrelative to the work support and laterally relative to the needle barand to the line 5 of stitching.

2. A trimming device, for sewing machines having a stitching mechanismincluding a needle bar, comprising a base with a bore; a work support; arotatable circular cutter; an eccentric bushing turnable and endwisemovable in the bore, adapted to locate and support the circular cutterrelative to the work support and laterally relative to the needle barand to .the line of stitching; and operating mechanism associated withthe needle bar adapted to rotate the circular cutter.

3. A trimming device, for sewing machines having a needle bar,comprising a base; a circular cutter on the base; a clutch associatedwith the cutter; a crank arm associated with the clutch; a link on saidcrank arm; and a lever pivotally mounted on the base having a connectionwith the link and engagement with the needle bar, adapted to translatereciprocatory movement of the needle bar into rotatory movement of thecircular cutter.

4. A trimming device, for sewing machines hav ing a needle bar,comprising a base; a circular cutter; an intermittent feeding mechanismassociated with the circular cutter; a link attached to said feedingmechanism; and a lever pivotally mounted on the base having a connectionwith the link and engagement with the needle bar, adapted to translatereciprocatory movement of the needle bar into rotatory movement of thecircular cutter.

5. A trimming device, for sewing machines having a stitching mechanismincluding a needle, comprising a base; a work support; a rotatablecircular cutter; an eccentric and anguiarly disposed bushing in the baseadapted to locate and support the cutter relative to the work supportand laterally relative to the line of stitching; and operating mechanismassociated with the stitching mechanism adapted to rotate the cutter inthe angular and eccentric support with the plane of the axis of thecutter intersecting the needle at substantially a right angle to theline of stitching.

6. A trimming and feeding device, for sewing machines having a stitchingmechanism including a needle, comprising a base; a work support; arotatable circular cutter; eccentric means adapted to locate and supportthe cutter above the work support and laterally relative to the line ofstitching; and operating mechanism associated with the stitchingmechanism adapted to rotate the cutter in said eccentric means with theplane of the axis of the cutter intersecting the needle at substantiallya right angle to the line of stitching.

7. A trimming and feeding device, for sewing machines having a stitchingmechanism including a needle and a needle bar, comprising a base; a worksupport; a rotatable circular cutter; eccentric means adapted to locateand support the cutter relative to the work support and laterallyrelative to the line of stitching; and operating mechanism associatedwith the needle bar adapted to rotate the cutter in said means with theplane of the axis of the cutter intersecting the needle at substantiallya right angle to the line of stitching,

8. In a trimming device, for sewing machines including a reciprocatingneedle bar and needle, the combination of a base; a circular cutter;means including a lever connecting said reciprocating needle bar andcircular cutter, to impart step by step rotation to the latter; and aguard on the lever adapted to move an operator's fingers out of the pathof the reciprocating needle bar and needle.

9. A trimming device for sewing machines having a stitching mechanismincluding a needle bar and needle, the combination of a base; a circularcutter; means connecting said stitching mechanism and circular cutter,adapted to impart rotatory movement to the cutter; and a movable guardassociated with-said means adapted to move an operator's fingers out ofthe path of the needle bar and needle.

10. A trimming device, for sewing machines having a reciprocating needlebar, comprising a base; a rotatable circular cutter on the base;operating mechanism for imparting rotatory movement to the circularcutter; a lever in said operating mechanism having an inclined faceengaging the needle bar and adapted to be arcuately moved by the needlebar during its reciprocation.

11. A trimming device, for a sewing machine having a reciprocatingneedle bar, comprising a base; a rotatable circular cutter on the base;operating. mechanism for imparting rotatory movement to the circularcutter; a lever in said operating mechanism having an inclined faceengaging the needle bar and adapted to be arcuatelv moved by the needlebar during its reciprocation; and means adapted to change therelationship of the inclined face relative to the needle bar forcontrolling the extent of rotatory movement of the cutter.

12. A trimming device, for a sewing machine having a needle bar,comprising a base; a rotatable circular cutter on the base; operatingmechanism for imparting rotatory movement to the circular cutter; alever in said mechanism having an inclined face engaging the needle barand adapted to be arcuately moved by the needle bar during itsreciprocation; and means adapted to space the last named lever relativeto the needle and thereby to vary the rotatory movement of the circularcutter.

13. A trimming device, for a sewing machine having a needle bar,comprising a base; a rotatable circular cutter on the base; operatingmechanism for imparting rotatory movement to the circular cutter; alever in said mechanism having an inclined surface engaging the needlebar and adapted to be arcuately moved by the needle bar during itsreciprocation; a fixed inclined face on the lever; and an adjustableplate on the lever forming a secondary face on the lever adapted, withthe fixed inclined face, to impart a variable extent of movement to thecutter through the main operating mechanism.

14. A trimming device, for sewing machines having a needle bar,comprising a base; a circular cutter; operating means for the circularcutter including an arcuately movable lever with an inclined face; and aroller on the needle bar engaging the inclined face and adapted toimpart arcuate movement to the lever as the needle bar reciprocates.

15. A trimming device, for sewing machines having a needle bar,comprising a base; a circular cutter; operating means for the circularcutter; and an inclined face in said operating means engaging the needlebar and adapted to allow substantially greater relative needle bartravel and to translate reciprocatory movement of the needle bar intorotatory movement of the circular cutter.

16. A trimming and feeding device, for sewing machines having astitching mechanism including a needle bar, comprising a base with anangularly disposed bore; a work support; a rotatable circular cutter;and an eccentric bushing, turnable and endwise movable in the angularlydisposed bore, adapted to locate and support the circular cutter abovethe work support and laterally relative to the needle bar and to theline of stitching.

17. A trimming device for sewing machines, having a needle bar,comprising a base; a circular cutter on the base; a clutch associatedwith the cutter; a crank arm associated with the clutch; a link on saidcrank arm; and a U-shaped lever pivotally mounted on the base having aconnection with the link and engagement with the needle bar, adapted totranslate reciprocatory movement of theneedle bar into rotary movementof the circulate cutter.

18. A trimming device, for sewing machines, having a needle bar,comprising a base; an extension on the base; a circular cutter; anintermittent driving mechanismassociated with the cutter; a shaftsupporting the cutter for rotation in the base; a clutch on the shaft; acrank arm associated with the clutch; a link on the crank arm; and aU-shaped lever'pivotally mounted on theextension and having a short armpivotally connected to the link and having a long arm with an inclinedface engaging the needle bar, adaptd to be oscillated by the needle barand through the associated link and clutch to impart peripheral movementto the circular cutter.

19. In a trimming device for sewing machines. including a reciprocatingneedle bar and needle, the combination of a base; a circular cutter;means connecting said reciprocating needle bar and circular cutter toimpart step by step rotation to the latter; and a reciprocating guard insaid means adapted to move an operator's fingers out of the path of thereciprocating bar and needle.

20. A trimming device, for sewing machines having a movable needlecarrier, comprising a base; a rotatable circular cutter on the base;operating mechanism for imparting step by step rotatory movement to thecircular cutter; means in said operating mechanism having asubstantially angular face engaging the needle carrier and adapted to bemoved thereby during movement of the needle carrier.

21. A trimming device, for sewing machines, having a movable needlecarrier, comprising a base; a rotatable circular cutter on the base;operating mechanism, actuated by the movable needle carrier, adapted toimpart step by step rotation to said circular cutter; and meansincluding an adjustable and substantially angular face engaging theneedle carrier for altering the relation between said operatingmechanism and said needle carrier to vary the extent of stepby-steprotation imparted to the circular cutter.

22. A sewing machine having in combination a work-support, anoverhanging bracket-arm rising from said work-support, a needle-baractuating shaft journaled in said overhanging arm, a needle carrying baractuated thereby, a loop-taker located below the work-support, a framefixed to said work-support, an eccentric bushing carried by said frame,a shaft carrying a cutting wheel mounted in said bushing, means forimparting an intermittent one-way motion to said cutting wheel, saidlast-named means including adjustable means for varying the movementimparted to said cutting wheel.

23. A sewing machine having in combination a work-support, a sewingmechanism, a frame on said work-support, an eccentric bushing carried bysaid frame, a shaft carrying a cutting wheel mounted in said bushing,means for imparting an intermittent one-way motion to said cutting wheelconcurrently with the operation of the sewing mechanism, and means forlocking the eccentric bushing in divers positions.

24. A sewing machine having in combination a work-support, a sewingmechanism, a frame on said work-support, an eccentric bushing carried bysaid frame, a shaft carrying a cutting wheel mounted in said bushing,means for imparting an intermittent one-way motion to said cutting wheelconcurrently with the operation of the sewing mechanism and includingadjustable means for varying the movement imparted to the cut- 7 aneedle, comprising a base; a work support; a

rotatable cutter; eccentric means adaped to locate and support thecutter relative to the work support; and operating mechanism adapted torotate the cutter in said eccentric means in timed relation to theoperation of the stitching mechanism.

26. A trimming and feeding device, for sewing machines having astitching mechanism including aneedle, comprising a base; a worksupport; a circular cutter; eccentric means adapted to locate andsupport the cutter above the work support and laterally relative to theline of stitching; and operating mechanism adapted to rotate the cutterin said eccentric means in timed relation to the operation of thestitching mechanism.

27. In a trimming device, for sewing machines including a needle, thecombination of a base; 9.

circular cutter; means including a lever for operating the circularcutter; and a guard on said lever adapted to move an operator's fingersout of the path of the needle.

28. A trimming device, for sewing machines having a stitching mechanismincluding a needle, the combination of a base; a circular cutter; meansfor operating said circular cutter; and a movable guard associated withsaid means adapted to move an operator's fingers out o! the path of theneedle.

29. A trimming device, for sewing machines having a movable needlecarrier, comprising a base; a rotatable circular cutter on the base;operating mechanism associated with said movable needle carrier forimparting rotatory movement to the circular cutter; and means in saidoperating mechanism including a substantially angular i'ace engaging theneedle carrier for changing the extent of rotatory movement oi thecutter.

JOHN P. W18.

